Upgrade tot 12.2 is useless.
You cannot use rt3 maps with the Stilo. Correct me if I'm wrong but as far as I know
rt3 maps use DVD and the Stilo does not have a DVD player.
Latest maps are 2010 / 2011 Navteq.
Fiat has stopped updating the maps for Connect Nav + ( that means they do not want to pay Navteq anymore for updates ).